INSTALLATION OF SPARK PLUGS
Before installing spark plugs, ensure that threads within cylinder are clean and undamaged.
—CAUTION—
Make certain the deep socket is properly seated on spark plug
hexagon as damage to plug could result if wrench is cocked to
one side when pressure is applied.
1. Apply anti-seize compound sparingly to threads and install gasket and spark plugs. Tighten plugs to a
torque of 360 to 420 inch-pounds.
2. Carefully insert terminal insulator in spark plug and tighten coupling nut.
IGNITION SWITCH
REMOVAL OF IGNITION SWITCH
l. Ensure ignition switch is in OFF position.
2. Gain access to and disconnect positive lead (+) from battery.
3. Remove ignition switch retaining nut from switch on forward side of instrument panel and withdraw
switch from panel.
4. Mark wires and note their position on switch. Disconnect wires.
INSTALLATION OF IGNITION SWITCH (figure 74-33)
1. Attach wires to switch as shown in figure 74-33.
2. Check for proper operation of ignition switch as follows:
a. Disconnect P-lead from right magneto.
b. Connect one lead of ohmmeter to P-lead and other lead to airframe ground.
c. With switch in OFF, L or START positions, ohmmeter should indicate a closed circuit.
d. With switch in R or BOTH positions, ohmmeter should indicate an open circuit.
3. Reconnect P-lead to magneto.
4. Position ignition switch in instrument panel and secure with retaining nut.
5. Connect positive lead (+) to battery and reinstall any access covers previously removed.
74 - 31 - 00
Page - 74-27
Reissued: August 1, 1986
2J23
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
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